362 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



distance apart, however, showing a rather unusual degree of 

 variation. In the Rincon Mountains specimen they are ahnost 

 in contact, and in the Nogales one are more approximate than 

 in any of the Williams examples. In these two the thoracic 

 punctuation is also denser than in the others. 



44. Pachybrachys texanus Bowditch 



Dull yellow with brown markings which vary much in shade 

 and distinctness; eyes narrowly separated; elytra distinctly 

 striate at sides and rear; front tibiae of the male sinuate on the 

 inner side near the apex, the inner angle produced in a long stout 

 curved spur; front claws of male obviously larger than the others. 

 Ave. length 2.4 mm. Texas. 



Head moderately closely punctate, front flat with fine impressed median line, 

 markings varying from distinct to almost wanting, no ocular lines. Eyes 

 separated in the male by about two-thirds the length of the basal antennal 

 joint, in the female by the length of the basal joint or a little less. Antennae 

 pale basally, outer joints dusky, half the length of the body in the female, about 

 two-thirds the length of the body in the male. 



Prothorax moderately transverse, sides broadly rounded, widest behind the 

 middle, very slight^ convergent behind, more obviously so in front; surface 

 densely but a little unevenly punctate, side margins smooth; markings diffuse, 

 pale rust colored to dark brown. 



Elytra closely confusedly punctate in the scutellar region, elsewhere with 

 impressed striae which are more or less irregular or broken at the middle of 

 each elytron; two outer striae regular, the eighth feebly or scarcely interrupted 

 behind the humerus; marginal interspace with a few punctures toward the 

 base; shield distinct; markings variable in distinctness, the standard spots 

 usually indicated, but occasionally wanting. 



Pygidium brown and yellow; body beneath brown and yellow, the colors 

 distributed as usual; legs yellow with brown spots on the thighs. 



Length 1.9 to 2.8 mm.; width 1 to 1.45 mm. 



Dislribulion. — Texas: The type and great majority of specimens seen by 

 me are from Brownsville, taken from April to August by Wickham, Barber, 

 Dury, Wolcott, Schaeffer and others; Arroyo, Dec. 10 (Townsend); Columbus, 

 June (Hubbard & Schwarz); Victoria, Mar. 3 to Apr. 2 (Schwarz). 



The narrowly separated eyes combined with the greatly 

 developed terminal spur of the front tibiae distinguish this species 

 from all others known to me except the following, which see for 

 a statement of differences. In calcaratus there is a similar devel- 

 opment of the tibial spur, but in this species the eyes are nuich 

 less approximate. 



